Convert between Unicode Normalization Forms on the unix command-line
In Unicode, some character combinations have more than one representation.
Unix & Linux
redirect sound (microphone) via ssh, how to telephone via ssh?
How can I redirect the microphone of one computer to listen to it on another computer via ssh? Which is the right device or which is the right command line?
Compress a directory using tar/gz over SSH to local computer?
I’d like to essentially tar/gz a directory on a remote machine and save the file to my local computer without having to connect back into my local machine from the remote one. Is there a way to do this over SSH? The tar file doesn’t need to be stored on the remote machine, only on the local machine. Is this possible?
How to test whether SSH has passwordless access without prompting for password?
I’m writing an unattended shell script that sets up a new server. Since I may run it multiple times, I want to check whether passwordless SSH access has already been set up. A command like
Set and Shopt – Why Two?
set and shopt are both shell builtins that control various options. I often forget which options are set by which command, and which option sets/unsets (set -o/+o, shopt -s/-u). Why are there two different commands that seemingly do the same thing (and have different arguments to do so)? Is there any easy way/mnemonic to remember which options go with which command?
Why does a bash here-string add a trailing newline char?
The following examples show that a newline is added to a here-string.
Why is this done?
ssh Unable to negotiate: “no matching cipher found”, is rejecting cbc
I am trying to ssh to remote machine, the attempt fails:
Install Java 6 from Oracle to Debian Lenny
Since Java 6 is not available in Debian 5 I decided to take it from Oracle. I have downloaded Java 6 SDK in file jdk-6u45-linux-i586-rpm.bin. But how to install it?
Why is bash’s prompt variable called PS1?
The environment variable for the bash prompt is called PS1 (usually set in ~/.bashrc). What does PS1 stand for? Is there a PS2?
What is the “~/” directory?
I’m trying to locate where some files are stored and I can easily browse to them via ssh by going to “cd ~/foldername”, however, I have no idea what directory “~/” actually is.